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Sigmoidal   Listen
adjective
Sigmoidal, Sigmoid  adj.  Curved in two directions, like the letter S, or the Greek sigma.
Sigmoid flexure (Anat.), the last curve of the colon before it terminates in the rectum.
Sigmoid valves. (Anat.) See Semilunar valves, under Semilunar.





Collaborative International Dictionary of English 0.48


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"Sigmoidal" Quotes from Famous Books



... intermediate between the ordinary slipper-shaped corolla and the perfect peloria just described, and which he calls sigmoid peloria. This flower is intermediate in direction between the erect peloria and the ordinary reflected flower. The tube is curved like a swan's neck and is dilated in front into two hollow bosses, such as we see in the lower lip of an ordinary flower; beyond these it is contracted ...
— Vegetable Teratology - An Account of the Principal Deviations from the Usual Construction of Plants • Maxwell T. Masters


Words linked to "Sigmoidal" :   sigmoid flexure


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